Occurrence pattern: Euonymus japonicus is affected by larval feeding leaves. It occurs in three generations in Hunan. Overwintering adults emerged in mid-April to lay eggs. In late April, they began to infest. Later in mid-May, they gradually entered the earth, and they emerged in mid-June. They emerged in late June. The second generation was harmed. In early August, he was buried in the earth, emerged in mid-August, and died in late August in the third generation. The worst is the first and second generation. In the mild climate and abundant rainfall season, the damage is most serious. In the flood season, the leaves of the whole plant can be lighted in 2 to 3 days, making the plants bald. In the season with sufficient rainfall, the plants can still grow leaves. If the plants are killed after encountering high temperature and drought, the whole plant will die. Therefore, it is necessary to prevent and control them in time.
Prevention and control methods: A. Turn over the soil in winter to exterminate overwintering insects. B. The overwintering adults fly weakly and kill them in time for emergence. C. The early stage of larvae damage, timely spraying control, prevention and control agents are: 90% trichlorfon crystal 1000 times, 20% speed killing D 5000, Bacillus thuringiensis 0.2 to 0.5 billion spores / ml.
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